The Urals and Siberian vacuum residues are considered difficult to process in the ebullated bed hydrocracking because of their increased tendency form sediments. Their achievable conversion rate reported literature is 60%. Intercriteria analysis was used assess data from a commercial residue hydrocracker during processing blends three residues: Urals, Light, Basra Heavy. revealed that main cont...

It was established based on the analysis of results published works and obtained by authors that there is no information behavior distribution antimony chalcogenides - Sb2S3, Sb2Se3, Sb2Te3, as well double systems Sb2S3-Sb2Se3, Sb2S3-Sb2Te3 Sb2Se3-Sb2Te3 under vacuum processing conditions for polymetallic mattes performed at 1100-1250 °C a 15 0.7 kPa. found saturated vapor pressure values monoc...

Poly (propylene fumarate) (PPF), a linear unsaturated polyester consisting of alternating propylene glycol and fumaric acid units, can be cured in vivo to fill the skeletal defects with minimal surgical intervention. Many different methods have been reported for synthesizing PPF, but none of them gives a clear method. The present paper introduces two new methods in PPF synthesis: Modified reflu...

The evaluation of a free fluid surface in a porous medium has several mathematical applications that are important in industries using molds, particularly in the fluid injection process. The vacuum-assisted resin transfer molding (VARTM) process is a promising technology in the primary composite industry. An accurate computational simulation of the VARTM process would be a cost-effective tool i...

A study comparing the recovery of microorganisms from a transiently vented biphasic brain heart infusion medium bottle and a vacuum bottle containing tryptic soy broth demonstrated that growth was initially detected on the slant of the biphasic bottle or on a routine subculture of either broth in nearly 50% of instances. All organisms were isolated equally well in both bottles, with the excepti...

A concept of a nature-inspired pedestrian bridge which tries to merge architectural, structural and manufacturing aspects in an optimized way is presented. The 18.0-m-span bridge is designed as an overhead spatial frame of a complex double-curved shape, which is composed of twelve modules consisting of lightweight carbon fiberreinforced polymer (CFRP) sandwich construction. The modules are fabr...

PURPOSE The properties, performance, and applications of nonelectric disposable infusion pumps are reviewed. SUMMARY All nonelectric disposable infusion pumps exploit the same physical principle: mechanical restriction within the flow path determines the speed of pressurized fluid. The pressure generated by disposable pumps on fluid is 250-600 mm Hg, compared with 5-1200 mm Hg of pressure for...